From 588394c8e8f381e31710bb1533e561a9b749f519 Mon Sep 17 00:00:00 2001
From: hairrrrr <781728963@qq.com>
Date: Tue, 11 Feb 2020 13:16:38 +0800
Subject: [PATCH] 2-11

---
 .../prelesson/test/test.c                     | 234 ++++++++++++++++++
 1 file changed, 234 insertions(+)
 create mode 100644 C Crash Course/15 Write Large Programs/prelesson/test/test.c

diff --git a/C Crash Course/15 Write Large Programs/prelesson/test/test.c b/C Crash Course/15 Write Large Programs/prelesson/test/test.c
new file mode 100644
index 0000000..7086da4
--- /dev/null
+++ b/C Crash Course/15 Write Large Programs/prelesson/test/test.c	
@@ -0,0 +1,234 @@
+#define _CRT_SECURE_NO_WARNINGS 1
+
+#include<stdio.h>
+
+////全局变量
+
+//int f(void);
+//
+//int gAll = 12;
+//
+//int main(void){
+//	
+//	//__func__ 可以打印出当前函数的函数名，下划线一边是两个
+//	printf("in %s gAll = %d\n", __func__, gAll);
+//	f();
+//	printf("again in %s gAll = %d\n", __func__, gAll);
+//
+//	return 0;
+//}
+//
+//int f(void) {
+//	
+//	printf("in %s gAll = %d\n", __func__, gAll);
+//	gAll += 2;
+//	printf("again in %s gAll = %d\n", __func__, gAll);
+//
+//	return gAll;
+//}
+
+//int gAll = 12;
+//int g = gAll;
+//
+//int main(void) {
+//
+//	return 0;
+//}
+
+//const int gAll = 12;
+//int g = gAll;
+//
+//int main(void) {
+//
+//	return 0;
+//}
+
+//int f(void);
+//
+//int gAll = 12;
+//
+//int main(void) {
+//	
+//	int gAll = 2;
+//
+//	printf("in %s gAll = %d\n", __func__, gAll);
+//
+//	f();
+//
+//	printf("again in %s gAll = %d\n", __func__, gAll);
+//
+//	return 0;
+//}
+//
+//int f(void) {
+//	
+//	printf("in %s gAll = %d\n", __func__, gAll);
+//	gAll += 2;
+//	printf("again in %s gAll = %d\n", __func__, gAll);
+//
+//	return gAll;
+//}
+
+//int f(void);
+//
+//int main(void) {
+//
+//	f();
+//	f();
+//	f();
+//
+//	return 0;
+//}
+//
+//int f(void) {
+//
+//	static int All = 1;
+//	printf("in %s All = %d\n", __func__, All);
+//	All += 2;
+//	printf("again in %s All = %d\n", __func__, All);
+//
+//	return All;
+//}
+
+//int f(void);
+//
+//int gAll = 12;
+//
+//int main(void) {
+//
+//	printf("1 st\n");
+//	f();
+//	printf("2 nd\n");
+//	f();
+//
+//	return 0;
+//}
+//
+//int f(void) {
+//	
+//	int a = 0;
+//	int b = 0;
+//	static int All = 1;
+//
+//	printf("&All :  %p\n", &All);
+//	printf("&gAll:  %p\n", &gAll);
+//	printf("&a :    %p\n", &a);
+//	printf("&b :    %p\n", &b);
+//
+//	return All;
+//}
+
+//int* f(void);
+//void g(void);
+//
+//int main(void) {
+//
+//	int* p = f();
+//	printf("*p = %d\n", *p);
+//	g();
+//	printf("*p = %d\n", *p);
+//
+//	return 0;
+//}
+//
+//int* f(void) {
+//
+//	int i = 12;
+//
+//	return &i;
+//}
+//void g(void) {
+//
+//	int k = 24;
+//	
+//	printf("k = %d\n", k);
+//
+//	return k;
+//}
+
+//编译预处理 与 宏
+
+//#include<stdio.h>
+//
+//const double PI = 3.14159;
+//
+//int main(void) {
+//
+//	printf("%f\n", 2 * PI * 3.0);
+//	return 0;
+//}
+
+//#include<stdio.h>
+//
+//#define PI  3.14159
+////注意：不写分号 不写等于号
+//
+//int main(void) {
+//
+//	printf("%f\n", 2 * PI * 3.0);
+//	return 0;
+//}
+
+//int main(void) {
+//
+//	printf("%s : %d\n", __FILE__, __LINE__);
+//	printf("%s %s\n", __DATE__, __TIME__);
+//
+//	return 0;
+//}
+
+//#define cube(x) ((x) * (x) * (x))
+//
+//int main(void) {
+//
+//	printf("%d\n", cube(5));
+//	return 0;
+//}
+//
+//#define ERROR1(x) (x * 57)
+//#define ERROR2(x) (x) * 57
+//
+//int main(void) {
+//	
+//	int i = 1;
+//	printf("%d\n", ERROR1(i + 2));
+//	printf("%d\n", 300 / ERROR2(1));
+//
+//	return 0;
+//}
+
+//#define PRETTY_PRINT(msg) printf(msg);
+//
+//int main(void) {
+//
+//	int n = 0;
+//
+//	printf("Input an number\n");
+//	scanf("%d", &n);
+//
+//	if (n < 10)
+//		PRETTY_PRINT("less than 10\n");
+//	else
+//		PRETTY_PRINT("more than 10\n");
+//
+//	return 0;
+//}
+
+//#include<stdio.h>
+//#include<string.h>
+//
+//#define TOUPPER(c) ('a' <= (c) && (c) <= 'z' ? (c) - 'a' + 'A' : (c))
+//
+//int main(void) {
+//
+//	int i = 0;
+//	char s[1000];
+//	strcpy(s, "abcd");
+//	putchar(TOUPPER(s[++i]));
+//
+//	return 0;
+//}
+
+//大程序结构
+
+